super sharp shooter Posted June 2, 2014 Share Posted June 2, 2014 After changing the head gasket in my hpi baja i can't get it to start. There is fuel and it has a spark but won't fire up.so now I'm stuck. Before i take it to the model shop i was wondering if I'm missing something simple.. your help please... Quote Link to comment Share on other sites More sharing options...
sean-vrs Posted June 2, 2014 Share Posted June 2, 2014 if the engine was running before you need to check the gasket isnt covering the transfer ports this gives you a rough idea Quote Link to comment Share on other sites More sharing options...
super sharp shooter Posted June 2, 2014 Author Share Posted June 2, 2014 I'm sure that it wasn't covering anything when i put it on????? Quote Link to comment Share on other sites More sharing options...
marder Posted June 3, 2014 Share Posted June 3, 2014 (edited) Did you take carb off? Edited June 3, 2014 by marder Quote Link to comment Share on other sites More sharing options...
super sharp shooter Posted June 3, 2014 Author Share Posted June 3, 2014 No mate didn't take the carb off or the pipe. Quote Link to comment Share on other sites More sharing options...
mini-z-awd Posted June 3, 2014 Share Posted June 3, 2014 did you line the ring up properly theres a little tab in the piston were the ring go`s to the front Quote Link to comment Share on other sites More sharing options...
super sharp shooter Posted June 3, 2014 Author Share Posted June 3, 2014 All lined up with the pin on the piston at the intake. I'm really not sure what's wrong. It's in the back of my truck at the moment so when I finish work I will take it to the model shop. The guy in the shop claims he's a baja wizz so this will test him. I was hoping I could sort it out but I tried all of the above and will not run so it's beyond me. If worst case if will up grade to a new engine but would rather not until this on is knackered. Quote Link to comment Share on other sites More sharing options...
Tamiyacowboy Posted June 3, 2014 Share Posted June 3, 2014 its a simple weedeater engine ( way back yonder times we modded weed eaters to fit in airplanes ) here is my guestimate on problem. during the re-build you somehow got distracted, you think you put the gasket on right but what you have done its flipside it. its rotated 90 degree and now covers the inlet/outlet port. more find the inlet if it wont fire up. take of the carb, just from the barrel unit and have a peek down, roll engine down to BDC ( bottom dead center ) and slowly rotate upto TDC (top dead center ) you should if you crank around into a funny pos be able to see the glint of the piston ring/postion as it passes and closes the inlet port, if not just whip of the head n barrel ( i advise carb and exhaust is removed on re-builds, it allows you to seat the head and barrel correct ) and make sure the gasket is seated correct, has not been split or damaged, then replace barrel and head, pop exhaust and carb back on. check for spark, rest plug against engine head and pull it over you should have a nice bright blue sparker. tic tic tic tic tic. pop a very small drop of fuel into the head ( twostoke oil cap, pop juice in untill it just covers bottom of lid, tip this into engine head) replace sparkie and kick the engine over, that small amount of fuel should help kick the engine suck the carb and blow the exhaust and fire up 1 Quote Link to comment Share on other sites More sharing options...
marder Posted June 3, 2014 Share Posted June 3, 2014 (edited) Make sure the fuel line are connected, fuel feed to bottom of carb, Return to top of carb next to primer bulb Won't run if wrong way round Edited June 3, 2014 by marder Quote Link to comment Share on other sites More sharing options...
super sharp shooter Posted June 3, 2014 Author Share Posted June 3, 2014 well after a visit to the model shop today I've found out that i have scored the chamber and not getting any compression/vacume to pull the fuel through the fuel and thats the cause of the non runner. Also I've found out that i have 7 fins missing on the flywheel so the guy said that this might of caused extra vibration on the engine and the might of caused the head bolt to come loose . He suggested that i could re sleeve it and buy a new flywheel but i thought is to upgrade to a 4 bolt bigger engine so now I'm looking for a new power plant. Quote Link to comment Share on other sites More sharing options...
Carl160180 Posted June 3, 2014 Share Posted June 3, 2014 OBR all the way Quote Link to comment Share on other sites More sharing options...
super sharp shooter Posted June 3, 2014 Author Share Posted June 3, 2014 OBR all the way very nice engine but a little out of my price range. I've got max Quote Link to comment Share on other sites More sharing options...
Rover Man Posted June 3, 2014 Share Posted June 3, 2014 Seems to fit what you need http://www.freeprawnracing.co.uk/zenoah-g320rc-31.8cc-4-bolt-engine-complete-with-clutch-new.html Quote Link to comment Share on other sites More sharing options...
super sharp shooter Posted June 3, 2014 Author Share Posted June 3, 2014 Will my vertigo clutch bell and carrier fit on that?? Quote Link to comment Share on other sites More sharing options...
(-:AD:-) Posted June 3, 2014 Share Posted June 3, 2014 not a obr fan, mmr all the way. the best of british http://mmrmodeltech.com/opencart/ but due to the price the zen 32 linked above is prob the best but is best suited to 4wd. I would go for a 28.5 or there abouts. http://www.freeprawnracing.co.uk/cy-f270-4-bolt-272cc-325-hp-engine-bb602.html http://www.freeprawnracing.co.uk/zenoah-28.5cc-4bolt-car-engine.html or http://mmrmodeltech.com/opencart/index.php?route=product/product&path=59_60&product_id=60&sort=p.price&order=ASC Quote Link to comment Share on other sites More sharing options...
Carl160180 Posted June 3, 2014 Share Posted June 3, 2014 very nice engine but a little out of my price range. I've got max Quote Link to comment Share on other sites More sharing options...
super sharp shooter Posted June 3, 2014 Author Share Posted June 3, 2014 choices choices Quote Link to comment Share on other sites More sharing options...
super sharp shooter Posted June 4, 2014 Author Share Posted June 4, 2014 Decided on the new engine. Zenoah G290RC Quote Link to comment Share on other sites More sharing options...
sean-vrs Posted June 4, 2014 Share Posted June 4, 2014 if buying new my money would go on this Quote Link to comment Share on other sites More sharing options...
super sharp shooter Posted June 6, 2014 Author Share Posted June 6, 2014 I looked at the 320 but decided to go for the smaller engine due to higher revs. Quote Link to comment Share on other sites More sharing options...
Feedtheinferno Posted June 6, 2014 Share Posted June 6, 2014 Can't rate these highly enough http://www.rcmodelz.co.uk/engines-parts/complete-engines/rcmk-cr290f-29cc-engine.html Quote Link to comment Share on other sites More sharing options...
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