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  1. #1

    1049CC 3-cylinder TR-1 vs 1100CC 4-cylinder MR-1. Which is more reliable?

    I'm looking at buying a used 4-stroke Yamaha and was wondering which is more reliable, the newer 1049CC 3-cylinder TR-1 engine or the older 1100CC 4-cylinder MR-1 engine?

  2. #2

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    Quote Originally Posted by JetBoatFun4Boys View Post
    I'm looking at buying a used 4-stroke Yamaha and was wondering which is more reliable, the newer 1049CC 3-cylinder TR-1 engine or the older 1100CC 4-cylinder MR-1 engine?
    They are not avail in the same skies. Mr1 has been around since 2002 (998cc) then ho version in 04. Has a proven record of reliability. Not uncommon to see rentals with 1000+ hours. It uses a sump/ scavenge oil system.and rev's to 10,000rpm ,,very critical to maintain proper oil fill level. The tr-1 also has an excellent record of reliability. With routine maintenance these motors will run forever. Far superior fuel consumption. Only negative, lil' low on power

  3. #3
    TJBrad04's Avatar
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    Quote Originally Posted by Yamafzs View Post
    They are not avail in the same skies. Mr1 has been around since 2002 (998cc) then ho version in 04. Has a proven record of reliability. Not uncommon to see rentals with 1000+ hours. It uses a sump/ scavenge oil system.and rev's to 10,000rpm ,,very critical to maintain proper oil fill level. The tr-1 also has an excellent record of reliability. With routine maintenance these motors will run forever. Far superior fuel consumption. Only negative, lil' low on power
    Well said... Either one is bullet proof from what I've seen in the wild.


  4. #4
    Quote Originally Posted by Yamafzs View Post
    Far superior fuel consumption. Only negative, lil' low on power
    Which has better fuel consumption, the high revving M1 or the larger, lower revving TR-1?

  5. #5

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    Quote Originally Posted by JetBoatFun4Boys View Post
    Which has better fuel consumption, the high revving M1 or the larger, lower revving TR-1?
    They actually are both same size. The TR1 and the 04 ho 160hp mr1 are both 1100 (1050cc) the non ho mr1 makes 140hp and is a 1000 (998cc) as far as fuel consumption. in my experience the mr1 is equivalent to a f-250. The tr1 is a ford focus.

  6. #6
    Not sure about some of the replies.
    As far as I know, there are 3 versions of the MR1 1100cc engine. All are 4 cylinder engines but with different variations of inductions and performance. They have rpm ratings from about 8000-10200rpm.
    A 110hp (found in the VX models)
    A 140hp (found in the older fx140)
    A 160hp (found in the older fx160 and 2006-2009 fxho models)

    The TR-1 is a 3 cylinder engine

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